FSP platforms: Clear area in CAR for cbmem
This patch clears the CAR area. The FSP loads the entire CAR area with a pattern instead of clearing it. At least the cbmem area needs to be cleared or cbmem will not use it. Change-Id: I829ddc26133353a784dfc01729af9b3bf427e889 Signed-off-by: Martin Roth <gaumless@gmail.com> Reviewed-on: http://review.coreboot.org/8195 Reviewed-by: Aaron Durbin <adurbin@google.com> Tested-by: build bot (Jenkins) Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
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@ -91,14 +91,22 @@ CAR_init_done:
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* ecx: stack base
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* ecx: stack base
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* edx: stack top
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* edx: stack top
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*/
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*/
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lea -4(%edx), %esp
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mov %edx, %esp
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movl %esp, %ebp
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movl %esp, %ebp
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pushl %ebx
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/* Clear the cbmem CAR memory region. */
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movl %ecx, %edi
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movl %edx, %ecx
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sub %edi, %ecx
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shr $2, %ecx
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xorl %eax, %eax
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rep stosl
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before_romstage:
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before_romstage:
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post_code(0x23)
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post_code(0x23)
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/* Call romstage.c main function. */
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/* Call romstage.c main function. */
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pushl %ebx /* main takes FSP_INFO_HEADER as its argument */
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call main /* does not return */
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call main /* does not return */
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movb $0xB8, %ah
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movb $0xB8, %ah
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jmp .Lhlt
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jmp .Lhlt
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